Your package rubygem-sanitize failed to build from source in current rawhide.
For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild
Created attachment 906427 [details]
Created attachment 906428 [details]
Created attachment 906429 [details]
Created attachment 909286 [details]
Patch for rawhide
Cause is incompatibility with rubygem-minitest-5.x; patch for rawhide attached.